www.youtube.com This is the trough in action. WHAT IS A TROUGH: www.youtube.com WHAT IS AN EVACUATED SOLAR TUBE: www.youtube.com
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dsierra123
Wednesday, March 21, 2012
Solar Energy - Parabolic Solar Trough Mirror Kit Evacuated Solar Tube
www.youtube.com This is the trough in action. WHAT IS A TROUGH: www.youtube.com WHAT IS AN EVACUATED SOLAR TUBE: www.youtube.com
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